diff --git a/addons/account/models/account_move_line.py b/addons/account/models/account_move_line.py
index 337453ccfc9..90e5e1858b0 100644
--- a/addons/account/models/account_move_line.py
+++ b/addons/account/models/account_move_line.py
@@ -1572,27 +1572,6 @@ class AccountMoveLine(models.Model):
             for root in self.env['account.root'].browse(id for [id] in self.env.cr.fetchall())
         }
 
-    # -------------------------------------------------------------------------
-    # TRACKING METHODS
-    # -------------------------------------------------------------------------
-
-    def _mail_track(self, tracked_fields, initial):
-        changes, tracking_value_ids = super()._mail_track(tracked_fields, initial)
-        if len(changes) > len(tracking_value_ids):
-            for i, changed_field in enumerate(changes):
-                if tracked_fields[changed_field]['type'] in ['one2many', 'many2many']:
-                    field = self.env['ir.model.fields']._get(self._name, changed_field)
-                    vals = {
-                        'field': field.id,
-                        'field_desc': field.field_description,
-                        'field_type': field.ttype,
-                        'tracking_sequence': field.tracking,
-                        'old_value_char': ', '.join(initial[changed_field].mapped('name')),
-                        'new_value_char': ', '.join(self[changed_field].mapped('name')),
-                    }
-                    tracking_value_ids.insert(i, Command.create(vals))
-        return changes, tracking_value_ids
-
     # -------------------------------------------------------------------------
     # RECONCILIATION
     # -------------------------------------------------------------------------
diff --git a/addons/mail/models/mail_tracking_value.py b/addons/mail/models/mail_tracking_value.py
index d6665f4a48c..89945a5a803 100644
--- a/addons/mail/models/mail_tracking_value.py
+++ b/addons/mail/models/mail_tracking_value.py
@@ -81,6 +81,11 @@ class MailTracking(models.Model):
                 'old_value_char': initial_value and initial_value.sudo().name_get()[0][1] or '',
                 'new_value_char': new_value and new_value.sudo().name_get()[0][1] or ''
             })
+        elif col_info['type'] in ['many2many', 'one2many']:
+            values.update({
+                'old_value_char': initial_value and ', '.join(initial_value.mapped('display_name')) or '',
+                'new_value_char': new_value and ', '.join(new_value.mapped('display_name')) or ''
+            })
         else:
             tracked = False
 
diff --git a/addons/project/models/project_task.py b/addons/project/models/project_task.py
index ae695891b31..0646ce0f07e 100644
--- a/addons/project/models/project_task.py
+++ b/addons/project/models/project_task.py
@@ -1157,24 +1157,6 @@ class Task(models.Model):
                 pass
         return new_followers
 
-    def _mail_track(self, tracked_fields, initial_values):
-        changes, tracking_value_ids = super()._mail_track(tracked_fields, initial_values)
-        # Many2many tracking
-        if len(changes) > len(tracking_value_ids):
-            for changed_field in changes:
-                if tracked_fields[changed_field]['type'] in ['one2many', 'many2many']:
-                    field = self.env['ir.model.fields']._get(self._name, changed_field)
-                    vals = {
-                        'field': field.id,
-                        'field_desc': field.field_description,
-                        'field_type': field.ttype,
-                        'tracking_sequence': field.tracking,
-                        'old_value_char': ', '.join(initial_values[changed_field].mapped('name')),
-                        'new_value_char': ', '.join(self[changed_field].mapped('name')),
-                    }
-                    tracking_value_ids.append(Command.create(vals))
-        return changes, tracking_value_ids
-
     def _track_template(self, changes):
         res = super(Task, self)._track_template(changes)
         test_task = self[0]